4-Bromophenyl Isocyanate

​4-Bromophenyl Isocyanate

Chemical Formula: C₇H₄BrNO
Structure: Phenyl ring with a ​bromine atom at the ​para position (4-position) and an ​isocyanate group (-N=C=O).
Physical Form: Colorless to pale yellow liquid or low-melting solid.

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​Properties

​Reactivity:​Isocyanate group reacts with nucleophiles (amines, alcohols, water) to form ​urethanes, ureas, and derivatives.​Solubility:Soluble in ​dichloromethane, toluene, THF; reacts with water.

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​Applications

​Organic Synthesis:Building block for ​pharmaceuticals, agrochemicals, and polymers.​Urea/Urethane Production:Reacts with amines → ​ureas; reacts with alcohols → ​urethanes.​Polymer Chemistry:Crosslinking agent for ​polymers and resins.

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​Safety Considerations

​Toxicity: Toxic and a ​respiratory irritant.​Moisture Sensitivity: Degrades in presence of water; handle under ​inert conditions (e.g., dry N₂ atmosphere).​Storage: Seal tightly, protect from humidity.

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Summary:
4-Bromophenyl isocyanate’s ​reactive isocyanate group and ​bromine substitution make it a key reagent for synthesizing ureas, urethanes, and polymers. Its utility in pharmaceuticals and materials science is tempered by ​strict safety protocols due to toxicity and moisture sensitivity.

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